Printer s rule



(No Model.)

A. D. STERN.

PRINTBRS'RULE. N0.312,302. Patented Feb. 17, 1885.

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1- ATENT ICE* AARON D. STERN, OF CHICAGO, ILLINOIS.

PRINTERS RULE.

SPECIFICATION forming part of Letters Patent No. 312,302, dated February 1'7, 1885.

Application filed Api-i125, 18.94.

To a/ZZ whom t ntf/, y concer/e: K

Be it known that I, AARON D. STERN, aeiti-v zen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Printers Rules, which are fully set forth in the following specification, reference beinghadtotheaoccmpanyingdrawings,forin ing a part hereof, and in which- Figure I is a side elevation of my improved printers rule extended out to its full length. Fig. 2 is an end view of the outer end of the rule. Fig. 3 is an end View of the rule closed. Fig. 4 is an end view of the part B on the plane y y. Fig. 5 is a view from between the ends of the bar a, showing the end view of the hook or stop a. Fig. 6 is a view from between the ends ofthe bar b, showing the end View of the part b2.

Like letters of reference indicate like parts.

The object of my invention is to construct an improved printers rule which shall be adl `justable.

My improved rule is composed of two parts, A'and B, each of which consists of a straight bar of sheet metal, @,witli a part, d, at its upper end. Upon one of said bars are soldered or riveted,opposite to each othe'r,bars a,which are beveled on their edges, as shown, and upon the other of said bars c are attached bars b, with undercut edges, so as to t upon the bevels of the bars a, and thus leave the outer and inner sides or faces of the rule in the saine plane. l

Upon the inner end of one ofthe bars a is a hook, a, formed by leaving a part of the edge of the bar a square, and the inner edge of the bar b, opposite said hook a', is cutaway so as to leave a hook, b2, with an undercut bevel- (No model edge to slide upon the beveled edge of the 4o bar a. One pair of suoli bars, provided with hooks,is placed at the upper edge of my rule, and a like pair of bars at the lower edge, diagonally opposite, or both on the same side. Between said bars a and b are placed blocks o2 and b, of the saine thickness as the bars o, which are soldered or riveted. and thus hold the inner ends of said bars iirnily together, and thereby give the rule lateral strength. The hooks or ears d serve the saure purpose as the like parts do in ordinary rules. The edges of the bars a and b need not be beveled, but may be of any forni. They are prefera! bly niade as here shown, in order to give the requisite degree of friction and steadiness of the parts upon each other.

1. An adjustable printers rule formed of parts or sections A B, whereof one of said sections is formed of bars a. and c and the other of bars b and c, united as shown, and whereof the parts a and b are adapted to slide between each other, substantially as specified.

2. An adjustable printers rule formed of bars a, b, and c, and blocks a2 b', and whereof 65 the parts a and b slide against each other upon their edges, substantially as Specified.

3. An adjustable printers rule formed of the parts A B, each of said parts formed of parts c, having a hook, d, and bars a or b, 7o and whereof said bars d and b are arranged to slide upon each other upon their edges, and provided with hooks a b, substantially as specified.

AARON D. STERN.

Witnesses:

. Louis STERN,

WM. ZIMMER-MAN. 

